1. Division of Transplantation; Department of Surgery; Leiden University Medical Center; Leiden University; Leiden The Netherlands
2. Eurotransplant International Foundation; Leiden The Netherlands
3. Section of Gerontology and Geriatrics; Department of Internal Medicine; Leiden University Medical Center; Leiden University; Leiden The Netherlands
4. Department of Gastroenterology and Hepatology; Erasmus MC - University Medical Center; Rotterdam The Netherlands